fundamentals in structural design of timber(1)

8/13/2019 Fundamentals in Structural Design of Timber(1)

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Architectural Structures 1 & 2

Group 4


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A curvature along theedge of a wood piece,measured at the point ofgreatest deviation, form astraight line from end toend of a piece.


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A warp resulting fromthe turning of theedges of a woodpiece in oppositedirections.


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The presence of bark

or absence of wood

at a corner or along

an edge of a piece.


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An area on the

surface of a board or

panel missed by a

planning machine.


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A surface charringcaused by overheatingof the cutting blades orabrasive belts duringshaping or finishing ofa material.


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The term applied towood after it is sawedor sliced into boards,planks, sticks, etc. forcommercial purposes.


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Lumber that is sawn,

edged and trimmed,

but not sufaced.


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Lumber that issurfaced with aplanning machine toattain a smoothsurface and uniformsize.


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Of or pertaining to adressed lumber havinga moisture contentexceeding 19% at thetime of manufacture.


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Of or pertaining to adressed lumber havinga moisture content of19% or less at thetime of manufacture.


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Of or pertaining tolumber that has beendried to reduce itsmoisture content andimprove itsserviceability.


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The dimension of lumber

before drying andsurfacing, used forconvenience in definingsize and computingquantity. Nominal sizesare always written withoutinch marks. Also callednominal size.


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The dimension of lumberafter seasoning and

surfacing, from 3/8 to inches (9.5 mm to 19.1mm) less than thenominal dimension. Adressed size is alwayswritten with inch marks.Also called DressedDimension.


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S1S- Surfaced on oneside

S2S- Surfaced on twosides

S4S- Surface on foursides

S1E- Surfaced on theedge

S2E- Surfaced on twoedges

S1S1E- Surfaced on oneside and on one edge


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The classification of

lumber on regard tostrength and utility inaccordance with thegrading rules of anapproved lumbergrading.


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Softwood lumberintended for general

building purposes,

including boards,

dimension lumber

and timbers.


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Yard lumber less

than 2 in. (51 mm)-

thick and 2 in . or

more wide.


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Yard number from 2inches to 4 inches

(51 mm to 102 mm)

thick and 2 inches or

more wide


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Dimension lumber 2inches to 4 inches(51mm to102mm)thick and 2inches to 4 incheswide, intended for usewhere high strengthvalues are notrequired.


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Structural lumber ofrectangular cross section,

from 2 inches to 4inches(51mm to 102mm)thick and more than 4inches (102mm) wide,graded primarily withrespect to bending strengthwhen loaded either on thenarrow face as a joist or inthe wide face as a plank.

fundamentals in structural design of timber(1)

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